/* Design Tokens & Custom Variables */
:root {
    --bg-dark: #090d16;
    --card-bg: rgba(21, 28, 46, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-glow: rgba(6, 182, 212, 0.05);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-light: #cbd5e1;
    
    /* Accents */
    --accent-teal: #0d9488;
    --accent-cyan: #06b6d4;
    --accent-indigo: #6366f1;
    --accent-grad: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
    --accent-glow: 0 0 20px rgba(6, 182, 212, 0.35);
    
    /* System States */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --success-border: rgba(16, 185, 129, 0.2);
    --error: #f43f5e;
    --error-bg: rgba(244, 63, 94, 0.1);
    --error-border: rgba(244, 63, 94, 0.2);
    --warning: #f59e0b;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-x: hidden;
    position: relative;
    padding: 2rem 1rem;
}

/* Decorative Glow Backgrounds */
.glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(140px);
    z-index: -2;
    opacity: 0.22;
    pointer-events: none;
    animation: orbPulse 12s ease-in-out infinite alternate;
}

.orb-1 {
    top: -150px;
    right: -100px;
    background: radial-gradient(circle, var(--accent-cyan) 0%, transparent 70%);
}

.orb-2 {
    bottom: -150px;
    left: -100px;
    background: radial-gradient(circle, var(--accent-indigo) 0%, transparent 70%);
    animation-delay: -6s;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.01) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.01) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

@keyframes orbPulse {
    0% { transform: scale(1) translate(0, 0); opacity: 0.18; }
    100% { transform: scale(1.15) translate(30px, 20px); opacity: 0.26; }
}

/* Main Container Layout */
.app-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Header Styles */
.app-header {
    text-align: center;
    margin-bottom: 0.5rem;
    position: relative;
}

.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    width: 100%;
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    transition: var(--transition-fast);
}

.back-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

.back-link.left:hover {
    transform: translateX(-2px);
}

.back-link.right:hover {
    transform: translateX(2px);
}

.link-icon {
    width: 16px;
    height: 16px;
}

.logo-area {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    width: 38px;
    height: 38px;
    filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.3));
}

.logo-text {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-text h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: var(--accent-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
    text-transform: uppercase;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* Navigation Tabs */
.tab-navigation {
    display: flex;
    justify-content: center;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--card-border);
    padding: 0.35rem;
    border-radius: 12px;
    width: fit-content;
    margin: 0 auto 1.5rem auto;
    backdrop-filter: blur(8px);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.07);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tab-icon {
    width: 16px;
    height: 16px;
}

/* Panel Containers */
.panel-container {
    width: 100%;
}

.tab-panel {
    display: none;
    animation: panelFade 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-panel.active {
    display: block;
}

@keyframes panelFade {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.grid-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
}

/* Card Structures */
.form-container, .output-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    backdrop-filter: blur(12px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    transition: var(--transition-normal);
}

.form-container:hover, .output-container:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

/* Input Fields & Groups */
.input-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.expiry-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.clock-badge {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: var(--transition-fast);
}

.clock-badge.sync-pending {
    background: rgba(99, 102, 241, 0.1);
    border: 1px dashed rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
}

.clock-badge.sync-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.clock-badge.sync-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-light);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(10, 15, 26, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-normal);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 12px rgba(6, 182, 212, 0.15);
    background: rgba(10, 15, 26, 0.8);
}

.field-help {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.field-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.char-count {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* Date Presets */
.date-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.preset-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    font-family: inherit;
    transition: var(--transition-fast);
}

.preset-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.1);
}

.preset-btn.active {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    border-color: rgba(6, 182, 212, 0.3);
}

/* Submit Button & Interactive Elements */
.submit-btn {
    width: 100%;
    padding: 0.85rem;
    border: none;
    border-radius: 8px;
    background: var(--accent-grad);
    color: white;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--accent-glow);
}

.submit-btn:active {
    transform: translateY(1px);
}

.submit-btn.secondary {
    background: linear-gradient(135deg, #4f46e5 0%, #3b82f6 100%);
}

.submit-btn.secondary:hover {
    box-shadow: 0 0 20px rgba(79, 70, 229, 0.35);
}

.btn-spinner {
    width: 18px;
    height: 18px;
    animation: rotate 0.8s linear infinite;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

/* Generator Shield Output Card */
.license-shield-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(10, 15, 26, 0.4);
    border-radius: 12px;
    overflow: hidden;
}

.shield-header {
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.shield-icon {
    width: 20px;
    height: 20px;
    color: var(--accent-cyan);
}

.shield-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-light);
}

.shield-body {
    flex-grow: 1;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
}

.key-display-wrapper {
    width: 100%;
    min-height: 120px;
    background: rgba(5, 8, 15, 0.6);
    border: 1px dashed rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1.25rem;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.key-placeholder {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.key-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.15rem;
    font-weight: 600;
    color: #22d3ee;
    word-break: break-all;
    line-height: 1.6;
    letter-spacing: 1px;
    animation: pulseGlowText 2s ease-in-out infinite alternate;
}

@keyframes pulseGlowText {
    0% { text-shadow: 0 0 2px rgba(34, 211, 238, 0.2); }
    100% { text-shadow: 0 0 10px rgba(34, 211, 238, 0.6); }
}

.action-buttons {
    width: 100%;
}

.action-btn {
    width: 100%;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.action-btn:hover:not(.disabled) {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.15);
}

.action-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    width: 16px;
    height: 16px;
}

.shield-footer {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.85rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
}

.metadata-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.meta-label {
    color: var(--text-muted);
}

.meta-val {
    color: var(--text-light);
    font-weight: 500;
}

#meta-status.success {
    color: var(--success);
}

/* Validator Result Card Styles */
.validation-result-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(10, 15, 26, 0.4);
    transition: var(--transition-slow);
}

.result-status-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.25rem;
    transition: var(--transition-normal);
}

.status-icon {
    width: 28px;
    height: 28px;
    color: var(--text-muted);
}

.validation-result-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.result-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    max-width: 280px;
    margin-bottom: 1.5rem;
}

.result-breakdown {
    width: 100%;
    background: rgba(5, 8, 15, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    animation: fadeIn 0.4s ease-out;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

.breakdown-label {
    color: var(--text-muted);
}

.breakdown-val {
    color: var(--text-light);
    font-weight: 500;
    font-family: 'Outfit', sans-serif;
}

/* Validator State Modifications */
.validation-result-card.state-valid {
    border-color: var(--success-border);
    background: linear-gradient(to bottom, rgba(16, 185, 129, 0.02), rgba(16, 185, 129, 0.07));
    box-shadow: 0 0 25px rgba(16, 185, 129, 0.05);
}

.validation-result-card.state-valid .result-status-icon-wrapper {
    background: var(--success-bg);
    color: var(--success);
}

.validation-result-card.state-invalid {
    border-color: var(--error-border);
    background: linear-gradient(to bottom, rgba(244, 63, 94, 0.02), rgba(244, 63, 94, 0.07));
    box-shadow: 0 0 25px rgba(244, 63, 94, 0.05);
}

.validation-result-card.state-invalid .result-status-icon-wrapper {
    background: var(--error-bg);
    color: var(--error);
}

/* History Section */
.history-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.75rem;
    backdrop-filter: blur(12px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.history-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-light);
}

.clear-history-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.clear-history-btn:hover {
    color: var(--error);
    border-color: rgba(244, 63, 94, 0.2);
    background: rgba(244, 63, 94, 0.05);
}

.history-table-wrapper {
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(10, 15, 26, 0.4);
    border-radius: 8px;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.85rem;
}

.history-table th, .history-table td {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.history-table th {
    background: rgba(255, 255, 255, 0.02);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.history-table tbody tr {
    transition: var(--transition-fast);
}

.history-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.history-table tbody tr:last-child td {
    border-bottom: none;
}

.history-table td.time-cell {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.history-table td.key-cell {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-cyan);
    font-size: 0.8rem;
    word-break: break-all;
}

.history-table tr.empty-state {
    text-align: center;
}

.history-table tr.empty-state td {
    padding: 2rem;
    color: var(--text-muted);
    font-style: italic;
}

.history-action-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-light);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    font-family: inherit;
    transition: var(--transition-fast);
}

.history-action-btn:hover {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: var(--bg-dark);
}

/* Footer Styles */
.app-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 1rem;
    letter-spacing: 0.5px;
}

/* Responsive Breakpoints */
@media (max-width: 860px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
    .license-shield-card {
        min-height: 250px;
    }
}

@media (max-width: 580px) {
    body {
        padding: 1rem 0.5rem;
    }
    .form-container, .output-container {
        padding: 1.5rem 1.25rem;
    }
    .logo-text h1 {
        font-size: 1.4rem;
    }
    .history-section {
        padding: 1.25rem 1rem;
    }
}